Is this Mantle Authentic?
 

Is this Mantle authentic? Thanks for any help

Do you have a better picture? The angle is very hard to see the signature


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I assume you are asking about the more modern style signature on his arm in the image?

The left side of the M appears to end abruptly at the border edge of the image. I suspect the signature may be part of the image, but hard to tell at this angle.